Self-Diagnostic System: Notes

SRS is monitored by Air Bag Control Module (ACM). ACM contains safing sensor, an integral sensor in circuitry of system, which is used to deploy air bag modules.

ACM monitors critical input and output circuits within air bag system, ensuring they operate correctly. Some circuits are tested continuously; others are checked under certain conditions. ACM provides information about air bag system, through SRS/AIR BAG warning light and DRB tester. Each circuit monitored by ACM has a corresponding fault code (message) assigned to it.